More and more conditions are now identified as having a genetic component, and controversial new genetic technologies potentially have major consequences for social relations and self-identity. How do family members respond to the information that they have a genetically transmitted disease or condition? How do they communicate (or not communicate) about their shared heritage? How do they decide who to tell and who not to tell within their family? Richly illustrated with the real experiences of individuals and families, Risky Relations is essential reading for anthropologists and sociologists of health and medicine, specialists in family and kinship, and health professionals concerned with the treatment and counseling of clients with genetic conditions. The lived impact of genetic technology on understanding within families with genetic conditions has never been systematically explored.